Stream scripts to V8 as they load - Blink side.

Source/bindings/core/v8/ScriptStreamerThread.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ScriptStreamerThread_h
+#define ScriptStreamerThread_h
+
+#include "platform/TaskSynchronizer.h"
+#include "public/platform/WebThread.h"
+#include "wtf/OwnPtr.h"
+
+#include <v8.h>
+
+namespace blink {
+
+class ScriptStreamer;
+
+// A singleton thread for running background tasks for script streaming.
+class ScriptStreamerThread {
+    WTF_MAKE_NONCOPYABLE(ScriptStreamerThread);
+public:
+    static void init();
+    static void shutdown();
+    static ScriptStreamerThread* shared();
+
+    void postTask(WebThread::Task*);
+
+    bool isRunningTask() const
+    {
+        return m_runningTask;
+    }
+
+    static void taskDone(void*)
+    {
+        ASSERT(shared()->m_runningTask);
+        shared()->m_runningTask = false;
+    }
+
+private:
+    ScriptStreamerThread()
+        : m_runningTask(false) { }
+
+    bool isRunning()
+    {
+        return !!m_thread;
+    }
+
+    void markAsCompleted(TaskSynchronizer* taskSynchronizer)
+    {
+        taskSynchronizer->taskCompleted();
+    }
+
+    blink::WebThread& platformThread();
+
+    // At the moment, we only use one thread, so we can only stream one script
+    // at a time. FIXME: Use a thread pool and stream multiple scripts.
+    WTF::OwnPtr<blink::WebThread> m_thread;
+    bool m_runningTask;
+};
+
+class ScriptStreamingTask : public WebThread::Task {
+    WTF_MAKE_NONCOPYABLE(ScriptStreamingTask);
+public:
+    ScriptStreamingTask(v8::ScriptCompiler::ScriptStreamingTask*, ScriptStreamer*);
+    virtual void run() OVERRIDE;
+
+private:
+    WTF::OwnPtr<v8::ScriptCompiler::ScriptStreamingTask> m_v8Task;
+    ScriptStreamer* m_streamer;
+};
+
+
+} // namespace blink
+
+#endif // ScriptStreamerThread_h